Tool-holder.



No. 693,399. Patented Feb. I8, |902. C. H. JENKINS.

TO0L HOLDER.

.(Appuntin med any 25. 1901.)

(Nu Model.)

E Noam: prrr co., pnomuwm WASHINGTON. n. c.

UNITED STATES l-ATEN'T OFFICE.

CHARLES H. JENKINS, OF LEBANON, NEW HAMPSHIRE, ASSIGNOR OF ONE- HALF TO FRANK B. KENDRICK AND WILLIAM F. DAVIS,`OF LEBANON, NEW HAMPSHIRE, PARTNERS UNDER FIRM-NAME OF KENDRICK AND DAVIS.

TOOL-HOLDER.

j SPECIFICATION forming part of Letters Patent No. 693,399, dated February 18, 1902.

l Application iiled May 25, 1901. 4Serial No. 61,870. (No model.)

To all whom it may concern.'

Be it known thaty I, CHARLES H. JENKINS, acitizen of the United States, residing at Lebanon, in the county of Grafton and State of New Hampshire, have invented a certain new and useful Tool-I-Iolder, of which the following is a specification, reference -being had therein to the accompanying drawings.

The invention relates toatool-holder which 1o is especially adapted for use in connection` with the tail-stock of a watchmakers lathe and for holding the various tools which are employed for setting jewels, dac., in Watches' and other like devices.

The invention is illustrated and described herein as essentially a jeWeling-tool but it is obvious that it is adapted for general use as Welland that it may be used for Aother and varied purposes-such as, for example, en-

zo larging holes in Watch-barrel'wheels, freeingv train,`and countersinking for screw-heads.

The object of the invention is to provide a.

tool-holder into which the'to'ol may be readily inserted and held therein and one from z5 which the tool may be quickly and easily removed.

A further object ofthe invention is to provide a tool-holder in which the tool may be 1 prevented from rotating While being operated 3o and at the same time capable of being adjusted to a great degree of accuracy for different kinds of work without removing the same from the holder.

Other and further objects and advantages 3 5 of the invention will appear as hereinafter set forth in the detailed description.

The invention consists of the novel features of construction hereinafter set forth and described and more particularly pointed out in 4o the claims hereto appended.

Referring to the drawings, Figurel isa perspective view of the lathe tail-stock with the tool-holder and cutter attached. Fig. 2 is an edge elevation of the tool-holder and cutter.

Fig. Sis a vertical longitudinal section of the same. Fig. 4 is a side elevation of another form of cutter. Fig. 5 is a similar view of the burnisher. Fig. 6 is a vertical section of a blank for jewel-setting. Fig. 7 is a similar view of the blank with the sink turned and cutter in position. Fig. 8 is a similar view of thebl'ank with the jewel placed therein. Fig. 9 is a similar View of the blank and jewel with the burnisher in position, and Fig. lOis a vertical section of the blank with the sotting reversed and the cutter in various positions for sizing and finishing.

throughout the several views.

A denotes'the bed ofV an ordinary watchmakers lathe, and B the tail-stock thereof.'

ais the head or body of the tool-holder, provided with a tapering shank b, adapted to enter said tail-stock and to be held firmly therein by frictional contact. The said head or body a is also provided with a tool-socket c, and dis a longitudinal ,slot located in said 'socket and provided with beveled edges ce.

f is an adj usting-screw fixed in said head V and provided Withacircumferentialgroove g.

h, c', and -7c are interchangeable tools, the two former being cutters and the latter a burnisher arranged and adapted to slide in said tool-socket. p

Z Z are bevelheaded set-screws secured in each of said tools and adapted to engage the beveled edges e e of said slot d, and m is a screw-pin carried by each of said tools and adaptedto engage the groove g in the adjusting-screw f.

n denotes a blank of suitable lmaterial into which it may be desired to set a jewel, and n' the sink therein which has been turned by the cutter h.

o is thejewel which is to be set, as shown in Figs. 8 and 9, or already set, as shown in Figi-10.

The operation of the device in so far as it has not already been disclosed is as follows: Suppose, for example, it is desired to set the jewel o in the blank fri. The blank n is placed in the lathe-chuck (not shown) in the ordinary manner, the cutter h having been inserted into the tool-socket c and clamped therein by the set-screws Z l and the screw-pin fm. made to engage with the groove g in the adjustingscrew f. The shank b is then inserted into the lathe tail-stock'until it is held therein Like letters of reference refer to like parts K with the proper degree of firmness. The working face of the cutter is then adjusted, by means of the adjusting-screw fand screwpin m, so that the working face of said cutter will be in aline with a line passing through the aXis of the shank b. This is the normal position of the tool when in the tool-holder. The tail-stock is then moved toward the revolving blank n and the cutting-tool adjusted, by means of the screw fand screw-pin m, until it is in the proper position to turn the sink fn', as shown in Fig. 7. The sink fn is then turned in the usual manner. The jewel is then placed in said sink, as shown in Fig. 8, the cutter h removed, and the burnisher 7a inserted in its place. The burnisher is then adjusted and placed in properposition in the same manner that the cutter was adjusted and placed in position and the jewel set, as shown in Fig. 9, in the usual" manner. The setting is then sized and finished by the cutter i, (see Fig. 10,) which is substituted for the burnisher and adjusted and operated in substantially the same manner as the cutter L was adjusted and operated.

It is to be noted that the tools, although clamped in the tool-socket by the set-screws l Z, are nevertheless free to slide in said socket when the adjusting-screw j' is turned, the screw-pin 'm engaging with the groove g of said adjusting-screw. These set-screws Z l, however, may be set so tight-ly that the tool will be rmly clamped in said tool-socket, s0 that it cannot slide therein, or, in other Words, the said screws will act as binding-screws, a result which is desirable when a number of operations are to be performed at one setting ot' the tool. The same result may also be effected, but not to such advantage as last above described, by screwing the screw-pin m tightly against the groove g in the adjusting-screwf.

YVhat I claim, and desire to secure by Letters Patent, is

1. A tool-holder, comprising a head having a tool-socket, and an adjusting-screw fixed in said head, combined with a tool arranged and adapted to slide in said tool-socket, and a pin or projection carried by said tool and engaging said adjusting-screw.

2. A tool-holder comprising a head having a tool-socket, and an ad justing-screw fixed in said head and provided with a circumferential groove, combined with a tool arranged and adapted to slide in said tool-socket and provided with a projecting pin engaging the groove in the adjusting-screw.

A tool-holder comprising a head having a tool-socket provided with a longitudinal slot, and an adjusting-screw fixed in said head and provided with a circumferential groove, combined with a tool arranged and adapted to slide in said tool-socket, a set-screw arranged in said tool and engaging said slot, and a projecting pin also arranged in said tool and adapted to engage the groove in the adjusting-sorew.

4. A tool-holder comprising a head having a tool-socket, a longitudinal slot in said socket,

provided with beveled edges, and an adjusting-screw IiXed in said head and provided with a circumferential groove, combined with a tool arranged and adapted to slide in said tool-socket, bevel-headed set-screws secured in said tool and adapted to engage the beveled edges of said slot, and a projecting pin carried by said tool and adapted to engage the groove in said adj usting-screw.

5. A tool-holder comprising a head havin a tool-socket, a longitudinal slot in said socket provided with beveled edges, and an adjusting-screw fixed in 4said head and provided with a circumferential `groove, combined with a tool arranged and adapted to slide in said tool-socket, bevel-headed set-screws secured in said tool and adapted to engage the beveled edges of said slot and a screw-pin carried by said tool and adapted to en gage the groove in the adjusting-screw.

6. A tool-holder comprising a head having a toolsoeket provided with a longitudinal slot, combined with a tool arranged and adapted to slide in said socket, and a set-screw carried by said tool and engaging said slot, whereby the tool may be readily inserted and held in said socket and quickly and easily removed therefrom.

7. A tool-holder comprising a head having a tool-socket and a longitudinal slot in said socket,provided with beveled edges,eombined with a tool arranged and adapted to slide in said socket, and a bevel-headed screw carried by said tool and engaging the beveled edges of said slot, whereby the tool may be readily inserted and held in said socket and quickly and easily removed therefrom.

In witness whereof I have hereunto affixed my signature, this 14th day of May, A. D. 1901, in the presence of two witnesses.

CHARLES H. JENKINS.

Witnesses:

WM. A. CHURCHILL, F. H. HosiroRD,

IOI) 

